Pins TRIZ Cases

Insulated contact paths inside a recess distinguish proper screw engagement from loose or improper contact, reducing false looseness alarms.

Swinging urging members press against the hitch inner face to remove play, reduce wear, and keep a carrying rack securely attached.

A built-in displaceable locking area adds screw locking during additive manufacturing, cutting rework, contamination, and assembly effort.

A self-lubricating plastic twisting die replaces complex metal segments to cut friction, heat, and buckling in threaded tie and rod forming.

Latching elements and securing tabs hold the retaining cap in pre-assembly, preventing displacement while reducing assembly force and easing disassembly.

A monolithic carrier with opposing tabs captures and aligns multiple nuts, preventing rotation and speeding bolt mating in tight assemblies.

A sealed cap fixed by a separate screw protects underwater fastening threads from seawater, contamination, and corrosion while allowing retightening.

An inclined surface and protective cap block particle and moisture ingress, preserving threaded adjustment and load-bearing reliability.

A cam-lock end effector clamps fastener threads without manual screwing, cutting swaging time while keeping captive fasteners secure.

A tapered entry and internal dome step guide and hold fasteners without thread damage, while snap-fit mounting avoids welding and loss.

A tapered entry and dome-step cavity guide and retain fasteners without thread damage, easing mounting-surface attachment and assembly.

A cam-lock end effector grips fastener threads without screwing or unscrewing, speeding captive fastener swaging while maintaining secure clamping.

A bracket-mounted female and receptacle connector improves alignment, secure attachment, and reusable release without destructive removal.

A free-spinning shroud and keyed torque coupler block conventional theft tools while still allowing authorized wheel fastener installation and removal.

An integrated dado nut, washer, and lockring secures saw blade stacks on short arbors while preserving cut quality and preventing loose parts.

A narrow annular groove with multiple direction changes creates many unique wheel-lock patterns while remaining practical for mass production.

Matched winding and thread pitch create frictional self-locking that blocks accidental release yet allows deliberate rotation and pulling.

A lockable cover protects the bolt tool interface while securing varied equipment to a base with theft resistance and marine-environment durability.

A breakaway support keeps the through-fastener pre-installed in the part, cutting logistics errors and preventing loss during assembly.

A nested ratchet fastener and unlocking bolt blocks screwdriver-only opening while allowing authorized housing access through a specific tool sequence.

An interference-fit holder keeps bolts from falling out before final screwing, simplifying assembly and reducing fastener loss.

A nested fastener and unlocking bolt blocks screwdriver access and requires a dedicated tool sequence to protect electronic components from theft.

Uniform metal protuberances replace embedded diamond particles to simplify friction spacer manufacturing and stabilize surface adhesion.

A hidden locking groove and rotating lock interface make key positions hard to observe, improving anti-theft nut removal resistance.

Continuous wire is cut into headless nails and driven into a plate, enabling faster string-art production with clearer thread visibility.

Hooked buckling washer and stud sleeve allow fine alignment, constrain object movement, and prevent screw slanting during assembly.

Spring-loaded drive elements let a multi-sided screw snap into standard nuts or sockets for secure, loss-proof installation without magnets.

A washer and cylindrical shank region lower contact pressure and creep, helping spring head screws retain preload at high temperatures.

A two-piece aluminum stem and sleeve seal blind holes from one side, avoiding threading while reducing corrosion, wear, and install time.

Leaf-shaped spring tongues let a captive screw sleeve absorb hole tolerances while preventing screw drop-out during assembly.

A spring-biased knob and ferrule assembly resists tilt and separation, enabling lower-cost snap-in or heat-stake panel fastening.

A longitudinal connection element pulls the attachment unit against the lower skin to transfer loads without composite layer unfolding.

Shoulder washers with limiting rims clamp the loading band and spread drop impact, reducing screw and washer detachment during assembly.

A bolt capture channel and swaged cable stop keep the fastener tethered during removal, reducing dropped-bolt FOD risk in aircraft maintenance.

A laterally removable spacer tube keeps pre-installed stud bolts from slipping during tower flange assembly, speeding joining while protecting threads.

A through-skin longitudinal connector clamps the attachment unit in tension to improve composite load transfer and avoid layer unfolding.

A centered adjustable fastener compensates welding dimensional errors so hidden door handles mount flush faster and more reliably.

A pre-assembled screw, nut, and housing module prevents nut damage during plate joining while enabling secure fastening and easy reuse.

Opposite-handed nested fasteners with a rotating joint resist vibration loosening and tampering without thread-locking compounds.

A rotating two-housing screw setter locks fasteners against lateral shift, improving wall frame alignment and storm resistance.

An integrated retainer ring gives a fastener a third-hand effect, holding heavy components in place during assembly without extra tools.

Lower rigidity around the first member’s through hole enables surface contact under tightening, suppressing fretting without extra fasteners.

Guided premounting tabs and peg alignment let a larger aircraft extinguishing fluid reservoir slide into place quickly and stay vibration-stable.

A shaped sealing region uses displaced sheet metal to create a tight press-in joint, avoiding separate coating steps, extra time, and added impact.

Opposing locking tabs keep a T-bolt engaged in the track during loosening, preventing hidden misrotation and accessory drop-out.

A curable sealing ring is compressed during blind riveting to fill joint gaps, enabling one-sided installation and eliminating manual sealing.

A snap-in clip guides and captively retains the fastener, easing panel cover hole misalignment and preventing screw backout or loss.

A one-way ratchet screw and dedicated unlocking sequence secure electronic housings against child access and internal component theft.

An adjacent bushing-and-pin hole layout secures bicycle drive modules without press-fit assembly, preventing bushing loss and unwanted load.